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TPS22981RGPR датащи(PDF) 1 Page - Texas Instruments |
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TPS22981RGPR датащи(HTML) 1 Page - Texas Instruments |
1 / 19 page connector ENHVU S0 V3P3OUT V3P3 V3P3 Exposed Pad ISET_S0 ISET_S3 ISET_V3P3 VHV VHV DC/DC DC/DC µC R SET_S0 R SET_S3 R SET_V3P3 TPS22981 www.ti.com SLVSBM6 – DECEMBER 2012 3.3V to 18V Thunderbolt Power Mux Check for Samples: TPS22981 1 FEATURES DESCRIPTION • Powered from 3.3V The TPS22981 is a current-limited power mux • 4.5V to 19.8V High Voltage Switch providing a connection to a peripheral device from either a low voltage supply (3V to 3.6V) or a high • 3V to 3.6V Switch voltage supply (4.5V to 19.8V). The desired output is • Adjustable Current Limit selected by digital control signals. • Thermal Shutdown The high voltage (VHV) and low voltage (V3P3) • Make Before Break Switch switch current limits are set with external resistance. • High Voltage Discharge Before Low Voltage Once the current limit is reached, the TPS22981 will Make control the switch to maintain the current at this limit. • Reverse Current Blocking When the high voltage supply is not present, the TPS22981 will maintain the connection to the output APPLICATIONS from the low voltage supply. Upon the presence of a high voltage line and high voltage enable signal, the • Notebook Computers high voltage switch is turned on in conjunction with • Desktop Computers the low voltage switch until a reverse current is • Power Management Systems detected through the low voltage switch, allowing a seamless transition from low voltage to the high voltage supply with minimal droop and shoot-through current. To prevent current backflow during a switch over from a VHV connection to a V3P3 connection, the TPS22981 will break the VHV connection, discharge the output to approximately 3.3V and then make the V3P3 connection. The output will transition to 0V when a load is present, before returning to 3.3V. The TPS22981 is available in a 4mm x 4mm x 1mm QFN package. Figure 1. Typical Application 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2012, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
Аналогичный номер детали - TPS22981RGPR |
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Аналогичное описание - TPS22981RGPR |
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